Manufacture of roads and like surfaces.



.l. HINES.

MANUFACTURE OF ROADS AND LIKE SURFACES.

APPLICATION FILED DEC.Z3| I916.

Patented Nov. 20, 1917.

some HINES, or Lonnorr, nn'anan'n.

earner.

Specification of Letters latent.

. MANUFACTURE OF ROADS AND LIKE SURFACES.

Patented Nov. an, tar a.

Application filed December 23, 1916. Serial No. 138,540.

To all whom it may concern:

Be it known that l[, JOHN HINEs, subject of the King ofGre at Britain,residing at 289 Finchley road, London, N. W., Engl v land, engineer,have invented certain new and useful Improvements in the Manufacture ofRoads and like Surfaces, of which the following is a specification.

This invention comprises an improved to manufacture of roads and likesurfaces. It

is well known to apply a flush carpet compounded of such materials asbroken stone or slag with a bituminous binder and filling material upon'road surfaces to form a hard to bound durable dustless road surface. Itis also well known to scarify a road surface'to some extent and to applya bituminous binder and filler to grout. an existing road applying moremetal until a desired depth to of treated material is obtained. Thisgroutin or penetration method generally requlred proceeding insuccessive stages or layers to insure the requisite depth of penetrationof the bitumen. These known at methods of manufacture can only becarried out successfully in fine dry warm weather as the material of theroad and the applied materials must not be only quite free from moisturebut must be heated to insure good W results, and as under. normalconditions such material after being once wet, retains the moisture fora long time, long delays occur entailing loss through-cost of labor etc.llt has been proposed with the object of avoid- 35 ing these delays todry and heat portions of road surface by forcing heated air on to thesame beneath a hood so as to prepare for the making or repairingoperations.

The full benefits of this method have not hitherto been reaped owin tohe subsequentexposure of the heate and ried surface for the carrying outof the later operations, and in this heated and dried state cold air andmoisture if present are at once 3 absorbed, and the desired penetrationof the bindin material and filler is not obtained.

Flus carpeting and grouting and like methods depend for their successupon the penetration of the binder into the existing W surface so thatthe new. andthe old marry together and any subsequentmovement of the oneupon the other causing wave formation under rolling or trafiic isavoided.

My invention comprises an improved 5% manufacture in which the road isheated and dried by a current of air or hot gases in a suitableinclosure or hood and the heated binder and sand or other filler aredelivered into the heated and dried road in the zone of heat or beforeexposure of the same to the atmosphere. The absorbent properties oftheheated and dried surface during cooling are thus fully utilized toeffect the desired penetration of'the binding materials.

The manufacture is preferably carried out by using ressure to force theheated binding material bitumen; asphalt, tar, etc., into the heatedroad and the filler is also preferably distributed by a current of air.or hot gases forming a hot blast.

A preferable form of apparatus for the purpose of carrying out themanufacture is set forth in my copending application, Serial Number138,541, filed -Dec. 23, 1916' but any suitable apparatus in which theheated binder and filling materials may be distributed on the heatedroad surface within the inclosure or hood used for the heating operationor immediately behind same may be employed.

In the appended drawing which is asectional view of the preferredapparatus above referred to a is a suitable running frame, 6 a blower, 0a suitable engine or motor, and (Z a furnace or air heater. The

, running frame may be adapted for propulsion or for trailing and anyconvenient arrangement for dr1v1ng the blower or fan may be followed.Adjacent to the furnace or air heater is a tank 6 for the'bitumen orlike binding material with the main air or gas trunk f carried over orthrough the tank e and preferably along between that tank and a bin 9for sand, or like other finely divided filling material. The air or gastrunk 7 passes along to the rear end of the tank 6 where an outlet pipein is'provided leading to a hood j of conical or rectangular form.Preferably the hood is of square pyramidal form and the main enters atthe vertex and preferably deflectors are ar-' ranged within the entranceto distribute the heated air or gas equally within the hoodr A bypassage 70 for the air or gases may be arrangedleading around the tankwith or part only of the gases may be sent around the tank. Any otherarrangement of flues for circulating heat around the tank may befollowed but preferably means will be provided in any case for insuringall the dampers e in the main. f so that the whole heat passing alongthe main trunk fwhen desired to the hood so as to insure sufficient forthe purpose of drying and heating the road.

A pipe from the tank 6 leads to a spraying or distributing pipe Z whichmay if detion into the road. Any other means for forcing the liquid maybe employed.

For the filler which may comprise sand, chippings, clinker dust,Portland cement, or the like, feeding screws such as n Fig. 4, or anyother conveying means, may be employed in the bin 9 and the filler maybe discharged into the outlet 72. and in the illustrated arrangement itenters a receptacle 0 on the hood j and is blown by the heated air orgas through the slot 0 into the hood near the liquid discharge. Adeflecting valve Q} is shown for closing the normal entrance to the hoodso as to deflect the filler and the current of heated air or gas intothe receptacle 0, see Fig. 5. The screws n in the sand bin 9 may bedriven from the road wheels or by hand or power as desired. The bottomof the receptacle '0' down which the sand, etc., will fall in itsdischarge may be curved transversely or provided with radiating ridgesor grooves or any like means for facilitating even dis- I -tribution offinely divided materials may be employed. v A deflector 0 may beemwithin or outside the hood as devised.

It is desirable to provide fines or linings so that the heated air orgases may be utilized when desired entirely for heating the bindingagent and the filler for example when the machine is not at work.

Beyond the hood j a second-sprayer pipe 8 Fig. 2 maybe carried by anextension t so that a second coat of the binder may be given to atreated surface as the hood is drawn forwardly for further operation.

It will be understood that the invention is not limited to the aboveconstruction which is given as an example only.

I claim:

1. The method of treating roadways and similar surfaces which consistsin first heating and drying the surface to be treated by the use of ahot-blast, protecting the heated and dried surface from exposure to theatmosphere, then delivering upon such surface whileso protected aheated, plastic biniler, and finally allowing the surface to coo 2. Inconstructing roadways and the like by grouting, flush carpeting andsimilar operations, the method of treating the surface which consists offirst heating and drying.

the same by the use of a confined hot-blast, protecting the heated anddried surface from exposure to the atmosphere, then delivering upon andinto such surface while so protected a heated binder and filler, andfinally allowing the surface to cool.

In testimony whereof I affix my signature.

JOHN HINES.

